I hate to recommend it because I don't like them, but you will want to setup an LMHOSTS file. The reason I don't like recommending this is because it's a pain in the a...er...neck to maintian when you start doing it on any large scale. However, since you are only talking about 2 machines, you shouldn't have any problem - you simply just create it and never touch it again unless you change the IPs and/or names.
The above like tells you how to make one. You can also look, in your %windir%\system32\drivers\etc folder, at the LMHOSTS.SAM file which is simply a sample file.
Assuming that the IP addresses for the wireless cards are different than the IP addresses for the wired cards, this solution will work. You will want to create lines similar to the following:
169.xxx.xxx.xxx XPDESK #PRE
169.xxx.xxx.xxx 2KLAP #PRE
The above IPs should match what you have configured for the WIRED cards. The #PRE directive is vital as it will stick those entries into your NetBIOS cache and prevent your b0x0rs from doing a broadcast to resolve the name.
There is one caveat, however, and is that if you ever want to have those machines talk over the wireless cards, they will still be looking to the wired IP addresses to resolve the names. To get around this, simply clear your NetBIOS cache.
One way to do this would be to create a simple batch file called something like WIRELESS.BAT that renames your live LMHOSTS file to something like LMHOSTS.WIR and initiates a refresh via "NBTSTAT.EXE -R". Then make a WIRED.BAT that "re-renames" the LMHOSTS.WIR file back to LMHOSTS and initiates a refresh via "NBTSTAT.EXE -R". Note: The -R must be in caps as -r does something different with NBTSTAT.EXE.
This, in theory should work. I don't have any multihomed boxes sitting on the same subnet right now so I can't test it out. If it doesn't work, simply delete LMHOSTS files and the batch files that you created.
Let me know if this works for you. Ideally, you want to be using a router for this kind of thing, but that's a little overboard for a small home network of two machines.